auth.c

00001 /*****************************************************************************
00002 * auth.c - Network Authentication and Phase Control program file.
00003 *
00004 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
00005 * Copyright (c) 1997 by Global Election Systems Inc.  All rights reserved.
00006 *
00007 * The authors hereby grant permission to use, copy, modify, distribute,
00008 * and license this software and its documentation for any purpose, provided
00009 * that existing copyright notices are retained in all copies and that this
00010 * notice and the following disclaimer are included verbatim in any 
00011 * distributions. No written agreement, license, or royalty fee is required
00012 * for any of the authorized uses.
00013 *
00014 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
00015 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00016 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
00017 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
00018 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00019 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00020 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00021 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00022 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
00023 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00024 *
00025 ******************************************************************************
00026 * REVISION HISTORY
00027 *
00028 * 03-01-01 Marc Boucher <marc@mbsi.ca>
00029 *   Ported to lwIP.
00030 * 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
00031 *   Ported from public pppd code.
00032 *****************************************************************************/
00033 /*
00034  * auth.c - PPP authentication and phase control.
00035  *
00036  * Copyright (c) 1993 The Australian National University.
00037  * All rights reserved.
00038  *
00039  * Redistribution and use in source and binary forms are permitted
00040  * provided that the above copyright notice and this paragraph are
00041  * duplicated in all such forms and that any documentation,
00042  * advertising materials, and other materials related to such
00043  * distribution and use acknowledge that the software was developed
00044  * by the Australian National University.  The name of the University
00045  * may not be used to endorse or promote products derived from this
00046  * software without specific prior written permission.
00047  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
00048  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
00049  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00050  *
00051  * Copyright (c) 1989 Carnegie Mellon University.
00052  * All rights reserved.
00053  *
00054  * Redistribution and use in source and binary forms are permitted
00055  * provided that the above copyright notice and this paragraph are
00056  * duplicated in all such forms and that any documentation,
00057  * advertising materials, and other materials related to such
00058  * distribution and use acknowledge that the software was developed
00059  * by Carnegie Mellon University.  The name of the
00060  * University may not be used to endorse or promote products derived
00061  * from this software without specific prior written permission.
00062  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
00063  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
00064  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00065  */
00066 
00067 #include "lwip/opt.h"
00068 
00069 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
00070 
00071 #include "ppp.h"
00072 #include "pppdebug.h"
00073 
00074 #include "fsm.h"
00075 #include "lcp.h"
00076 #include "pap.h"
00077 #include "chap.h"
00078 #include "auth.h"
00079 #include "ipcp.h"
00080 
00081 #if CBCP_SUPPORT
00082 #include "cbcp.h"
00083 #endif /* CBCP_SUPPORT */
00084 
00085 #include "lwip/inet.h"
00086 
00087 #include <string.h>
00088 
00089 #if 0 /* UNUSED */
00090 /* Bits in scan_authfile return value */
00091 #define NONWILD_SERVER  1
00092 #define NONWILD_CLIENT  2
00093 
00094 #define ISWILD(word)  (word[0] == '*' && word[1] == 0)
00095 #endif /* UNUSED */
00096 
00097 #if PAP_SUPPORT || CHAP_SUPPORT
00098 /* The name by which the peer authenticated itself to us. */
00099 static char peer_authname[MAXNAMELEN];
00100 #endif /* PAP_SUPPORT || CHAP_SUPPORT */
00101 
00102 /* Records which authentication operations haven't completed yet. */
00103 static int auth_pending[NUM_PPP];
00104 
00105 /* Set if we have successfully called plogin() */
00106 static int logged_in;
00107 
00108 /* Set if we have run the /etc/ppp/auth-up script. */
00109 static int did_authup; /* @todo, we don't need this in lwip*/
00110 
00111 /* List of addresses which the peer may use. */
00112 static struct wordlist *addresses[NUM_PPP];
00113 
00114 #if 0 /* UNUSED */
00115 /* Wordlist giving addresses which the peer may use
00116    without authenticating itself. */
00117 static struct wordlist *noauth_addrs;
00118 
00119 /* Extra options to apply, from the secrets file entry for the peer. */
00120 static struct wordlist *extra_options;
00121 #endif /* UNUSED */
00122 
00123 /* Number of network protocols which we have opened. */
00124 static int num_np_open;
00125 
00126 /* Number of network protocols which have come up. */
00127 static int num_np_up;
00128 
00129 #if PAP_SUPPORT || CHAP_SUPPORT
00130 /* Set if we got the contents of passwd[] from the pap-secrets file. */
00131 static int passwd_from_file;
00132 #endif /* PAP_SUPPORT || CHAP_SUPPORT */
00133 
00134 #if 0 /* UNUSED */
00135 /* Set if we require authentication only because we have a default route. */
00136 static bool default_auth;
00137 
00138 /* Hook to enable a plugin to control the idle time limit */
00139 int (*idle_time_hook) __P((struct ppp_idle *)) = NULL;
00140 
00141 /* Hook for a plugin to say whether we can possibly authenticate any peer */
00142 int (*pap_check_hook) __P((void)) = NULL;
00143 
00144 /* Hook for a plugin to check the PAP user and password */
00145 int (*pap_auth_hook) __P((char *user, char *passwd, char **msgp,
00146         struct wordlist **paddrs,
00147         struct wordlist **popts)) = NULL;
00148 
00149 /* Hook for a plugin to know about the PAP user logout */
00150 void (*pap_logout_hook) __P((void)) = NULL;
00151 
00152 /* Hook for a plugin to get the PAP password for authenticating us */
00153 int (*pap_passwd_hook) __P((char *user, char *passwd)) = NULL;
00154 
00155 /*
00156  * This is used to ensure that we don't start an auth-up/down
00157  * script while one is already running.
00158  */
00159 enum script_state {
00160     s_down,
00161     s_up
00162 };
00163 
00164 static enum script_state auth_state = s_down;
00165 static enum script_state auth_script_state = s_down;
00166 static pid_t auth_script_pid = 0;
00167 
00168 /*
00169  * Option variables.
00170  * lwip: some of these are present in the ppp_settings structure
00171  */
00172 bool uselogin = 0;            /* Use /etc/passwd for checking PAP */
00173 bool cryptpap = 0;            /* Passwords in pap-secrets are encrypted */
00174 bool refuse_pap = 0;          /* Don't wanna auth. ourselves with PAP */
00175 bool refuse_chap = 0;         /* Don't wanna auth. ourselves with CHAP */
00176 bool usehostname = 0;         /* Use hostname for our_name */
00177 bool auth_required = 0;       /* Always require authentication from peer */
00178 bool allow_any_ip = 0;        /* Allow peer to use any IP address */
00179 bool explicit_remote = 0;     /* User specified explicit remote name */
00180 char remote_name[MAXNAMELEN]; /* Peer's name for authentication */
00181 
00182 #endif /* UNUSED */
00183 
00184 /* Bits in auth_pending[] */
00185 #define PAP_WITHPEER    1
00186 #define PAP_PEER        2
00187 #define CHAP_WITHPEER   4
00188 #define CHAP_PEER       8
00189 
00190 /* @todo, move this somewhere */
00191 /* Used for storing a sequence of words.  Usually malloced. */
00192 struct wordlist {
00193   struct wordlist *next;
00194   char        word[1];
00195 };
00196 
00197 
00198 extern char *crypt (const char *, const char *);
00199 
00200 /* Prototypes for procedures local to this file. */
00201 
00202 static void network_phase (int);
00203 static void check_idle (void *);
00204 static void connect_time_expired (void *);
00205 #if 0
00206 static int  plogin (char *, char *, char **, int *);
00207 #endif
00208 static void plogout (void);
00209 static int  null_login (int);
00210 static int  get_pap_passwd (int, char *, char *);
00211 static int  have_pap_secret (void);
00212 static int  have_chap_secret (char *, char *, u32_t);
00213 static int  ip_addr_check (u32_t, struct wordlist *);
00214 
00215 #if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
00216 static int  scan_authfile (FILE *, char *, char *, char *,
00217              struct wordlist **, struct wordlist **,
00218              char *);
00219 static void free_wordlist (struct wordlist *);
00220 static void auth_script (char *);
00221 static void auth_script_done (void *);
00222 static void set_allowed_addrs (int unit, struct wordlist *addrs);
00223 static int  some_ip_ok (struct wordlist *);
00224 static int  setupapfile (char **);
00225 static int  privgroup (char **);
00226 static int  set_noauth_addr (char **);
00227 static void check_access (FILE *, char *);
00228 #endif /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
00229 
00230 #if 0 /* UNUSED */
00231 /*
00232  * Authentication-related options.
00233  */
00234 option_t auth_options[] = {
00235     { "require-pap", o_bool, &lcp_wantoptions[0].neg_upap,
00236       "Require PAP authentication from peer", 1, &auth_required },
00237     { "+pap", o_bool, &lcp_wantoptions[0].neg_upap,
00238       "Require PAP authentication from peer", 1, &auth_required },
00239     { "refuse-pap", o_bool, &refuse_pap,
00240       "Don't agree to auth to peer with PAP", 1 },
00241     { "-pap", o_bool, &refuse_pap,
00242       "Don't allow PAP authentication with peer", 1 },
00243     { "require-chap", o_bool, &lcp_wantoptions[0].neg_chap,
00244       "Require CHAP authentication from peer", 1, &auth_required },
00245     { "+chap", o_bool, &lcp_wantoptions[0].neg_chap,
00246       "Require CHAP authentication from peer", 1, &auth_required },
00247     { "refuse-chap", o_bool, &refuse_chap,
00248       "Don't agree to auth to peer with CHAP", 1 },
00249     { "-chap", o_bool, &refuse_chap,
00250       "Don't allow CHAP authentication with peer", 1 },
00251     { "name", o_string, our_name,
00252       "Set local name for authentication",
00253       OPT_PRIV|OPT_STATIC, NULL, MAXNAMELEN },
00254     { "user", o_string, user,
00255       "Set name for auth with peer", OPT_STATIC, NULL, MAXNAMELEN },
00256     { "usehostname", o_bool, &usehostname,
00257       "Must use hostname for authentication", 1 },
00258     { "remotename", o_string, remote_name,
00259       "Set remote name for authentication", OPT_STATIC,
00260       &explicit_remote, MAXNAMELEN },
00261     { "auth", o_bool, &auth_required,
00262       "Require authentication from peer", 1 },
00263     { "noauth", o_bool, &auth_required,
00264       "Don't require peer to authenticate", OPT_PRIV, &allow_any_ip },
00265     {  "login", o_bool, &uselogin,
00266       "Use system password database for PAP", 1 },
00267     { "papcrypt", o_bool, &cryptpap,
00268       "PAP passwords are encrypted", 1 },
00269     { "+ua", o_special, (void *)setupapfile,
00270       "Get PAP user and password from file" },
00271     { "password", o_string, passwd,
00272       "Password for authenticating us to the peer", OPT_STATIC,
00273       NULL, MAXSECRETLEN },
00274     { "privgroup", o_special, (void *)privgroup,
00275       "Allow group members to use privileged options", OPT_PRIV },
00276     { "allow-ip", o_special, (void *)set_noauth_addr,
00277       "Set IP address(es) which can be used without authentication",
00278       OPT_PRIV },
00279     { NULL }
00280 };
00281 #endif /* UNUSED */
00282 #if 0 /* UNUSED */
00283 /*
00284  * setupapfile - specifies UPAP info for authenticating with peer.
00285  */
00286 static int
00287 setupapfile(char **argv)
00288 {
00289     FILE * ufile;
00290     int l;
00291 
00292     lcp_allowoptions[0].neg_upap = 1;
00293 
00294     /* open user info file */
00295     seteuid(getuid());
00296     ufile = fopen(*argv, "r");
00297     seteuid(0);
00298     if (ufile == NULL) {
00299       option_error("unable to open user login data file %s", *argv);
00300       return 0;
00301     }
00302     check_access(ufile, *argv);
00303 
00304     /* get username */
00305     if (fgets(user, MAXNAMELEN - 1, ufile) == NULL
00306         || fgets(passwd, MAXSECRETLEN - 1, ufile) == NULL){
00307       option_error("unable to read user login data file %s", *argv);
00308       return 0;
00309     }
00310     fclose(ufile);
00311 
00312     /* get rid of newlines */
00313     l = strlen(user);
00314     if (l > 0 && user[l-1] == '\n')
00315       user[l-1] = 0;
00316     l = strlen(passwd);
00317     if (l > 0 && passwd[l-1] == '\n')
00318       passwd[l-1] = 0;
00319 
00320     return (1);
00321 }
00322 #endif /* UNUSED */
00323 
00324 #if 0 /* UNUSED */
00325 /*
00326  * privgroup - allow members of the group to have privileged access.
00327  */
00328 static int
00329 privgroup(char **argv)
00330 {
00331     struct group *g;
00332     int i;
00333 
00334     g = getgrnam(*argv);
00335     if (g == 0) {
00336       option_error("group %s is unknown", *argv);
00337       return 0;
00338     }
00339     for (i = 0; i < ngroups; ++i) {
00340       if (groups[i] == g->gr_gid) {
00341         privileged = 1;
00342         break;
00343       }
00344     }
00345     return 1;
00346 }
00347 #endif
00348 
00349 #if 0 /* UNUSED */
00350 /*
00351  * set_noauth_addr - set address(es) that can be used without authentication.
00352  * Equivalent to specifying an entry like `"" * "" addr' in pap-secrets.
00353  */
00354 static int
00355 set_noauth_addr(char **argv)
00356 {
00357     char *addr = *argv;
00358     int l = strlen(addr);
00359     struct wordlist *wp;
00360 
00361     wp = (struct wordlist *) malloc(sizeof(struct wordlist) + l + 1);
00362     if (wp == NULL)
00363       novm("allow-ip argument");
00364     wp->word = (char *) (wp + 1);
00365     wp->next = noauth_addrs;
00366     BCOPY(addr, wp->word, l);
00367     noauth_addrs = wp;
00368     return 1;
00369 }
00370 #endif /* UNUSED */
00371 
00372 /*
00373  * An Open on LCP has requested a change from Dead to Establish phase.
00374  * Do what's necessary to bring the physical layer up.
00375  */
00376 void
00377 link_required(int unit)
00378 {
00379   LWIP_UNUSED_ARG(unit);
00380 
00381   AUTHDEBUG(LOG_INFO, ("link_required: %d\n", unit));
00382 }
00383 
00384 /*
00385  * LCP has terminated the link; go to the Dead phase and take the
00386  * physical layer down.
00387  */
00388 void
00389 link_terminated(int unit)
00390 {
00391   AUTHDEBUG(LOG_INFO, ("link_terminated: %d\n", unit));
00392   if (lcp_phase[unit] == PHASE_DEAD) {
00393     return;
00394   }
00395   if (logged_in) {
00396     plogout();
00397   }
00398   lcp_phase[unit] = PHASE_DEAD;
00399   AUTHDEBUG(LOG_NOTICE, ("Connection terminated.\n"));
00400   pppLinkTerminated(unit);
00401 }
00402 
00403 /*
00404  * LCP has gone down; it will either die or try to re-establish.
00405  */
00406 void
00407 link_down(int unit)
00408 {
00409   int i;
00410   struct protent *protp;
00411 
00412   AUTHDEBUG(LOG_INFO, ("link_down: %d\n", unit));
00413 
00414   if (did_authup) {
00415     /* XXX Do link down processing. */
00416     did_authup = 0;
00417   }
00418   for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
00419     if (!protp->enabled_flag) {
00420       continue;
00421     }
00422     if (protp->protocol != PPP_LCP && protp->lowerdown != NULL) {
00423       (*protp->lowerdown)(unit);
00424     }
00425     if (protp->protocol < 0xC000 && protp->close != NULL) {
00426       (*protp->close)(unit, "LCP down");
00427     }
00428   }
00429   num_np_open = 0;  /* number of network protocols we have opened */
00430   num_np_up = 0;    /* Number of network protocols which have come up */
00431 
00432   if (lcp_phase[unit] != PHASE_DEAD) {
00433     lcp_phase[unit] = PHASE_TERMINATE;
00434   }
00435   pppLinkDown(unit);
00436 }
00437 
00438 /*
00439  * The link is established.
00440  * Proceed to the Dead, Authenticate or Network phase as appropriate.
00441  */
00442 void
00443 link_established(int unit)
00444 {
00445   int auth;
00446   int i;
00447   struct protent *protp;
00448   lcp_options *wo = &lcp_wantoptions[unit];
00449   lcp_options *go = &lcp_gotoptions[unit];
00450 #if PAP_SUPPORT || CHAP_SUPPORT
00451   lcp_options *ho = &lcp_hisoptions[unit];
00452 #endif /* PAP_SUPPORT || CHAP_SUPPORT */
00453 
00454   AUTHDEBUG(LOG_INFO, ("link_established: unit %d; Lowering up all protocols...\n", unit));
00455   /*
00456    * Tell higher-level protocols that LCP is up.
00457    */
00458   for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
00459     if (protp->protocol != PPP_LCP && protp->enabled_flag && protp->lowerup != NULL) {
00460       (*protp->lowerup)(unit);
00461     }
00462   }
00463   if (ppp_settings.auth_required && !(go->neg_chap || go->neg_upap)) {
00464     /*
00465      * We wanted the peer to authenticate itself, and it refused:
00466      * treat it as though it authenticated with PAP using a username
00467      * of "" and a password of "".  If that's not OK, boot it out.
00468      */
00469     if (!wo->neg_upap || !null_login(unit)) {
00470       AUTHDEBUG(LOG_WARNING, ("peer refused to authenticate\n"));
00471       lcp_close(unit, "peer refused to authenticate");
00472       return;
00473     }
00474   }
00475 
00476   lcp_phase[unit] = PHASE_AUTHENTICATE;
00477   auth = 0;
00478 #if CHAP_SUPPORT
00479   if (go->neg_chap) {
00480     ChapAuthPeer(unit, ppp_settings.our_name, go->chap_mdtype);
00481     auth |= CHAP_PEER;
00482   } 
00483 #endif /* CHAP_SUPPORT */
00484 #if PAP_SUPPORT && CHAP_SUPPORT
00485   else
00486 #endif /* PAP_SUPPORT && CHAP_SUPPORT */
00487 #if PAP_SUPPORT
00488   if (go->neg_upap) {
00489     upap_authpeer(unit);
00490     auth |= PAP_PEER;
00491   }
00492 #endif /* PAP_SUPPORT */
00493 #if CHAP_SUPPORT
00494   if (ho->neg_chap) {
00495     ChapAuthWithPeer(unit, ppp_settings.user, ho->chap_mdtype);
00496     auth |= CHAP_WITHPEER;
00497   }
00498 #endif /* CHAP_SUPPORT */
00499 #if PAP_SUPPORT && CHAP_SUPPORT
00500   else
00501 #endif /* PAP_SUPPORT && CHAP_SUPPORT */
00502 #if PAP_SUPPORT
00503   if (ho->neg_upap) {
00504     if (ppp_settings.passwd[0] == 0) {
00505       passwd_from_file = 1;
00506       if (!get_pap_passwd(unit, ppp_settings.user, ppp_settings.passwd)) {
00507         AUTHDEBUG(LOG_ERR, ("No secret found for PAP login\n"));
00508       }
00509     }
00510     upap_authwithpeer(unit, ppp_settings.user, ppp_settings.passwd);
00511     auth |= PAP_WITHPEER;
00512   }
00513 #endif /* PAP_SUPPORT */
00514   auth_pending[unit] = auth;
00515 
00516   if (!auth) {
00517     network_phase(unit);
00518   }
00519 }
00520 
00521 /*
00522  * Proceed to the network phase.
00523  */
00524 static void
00525 network_phase(int unit)
00526 {
00527   int i;
00528   struct protent *protp;
00529   lcp_options *go = &lcp_gotoptions[unit];
00530 
00531   /*
00532    * If the peer had to authenticate, run the auth-up script now.
00533    */
00534   if ((go->neg_chap || go->neg_upap) && !did_authup) {
00535     /* XXX Do setup for peer authentication. */
00536     did_authup = 1;
00537   }
00538 
00539 #if CBCP_SUPPORT
00540   /*
00541    * If we negotiated callback, do it now.
00542    */
00543   if (go->neg_cbcp) {
00544     lcp_phase[unit] = PHASE_CALLBACK;
00545     (*cbcp_protent.open)(unit);
00546     return;
00547   }
00548 #endif /* CBCP_SUPPORT */
00549 
00550   lcp_phase[unit] = PHASE_NETWORK;
00551   for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
00552     if (protp->protocol < 0xC000 && protp->enabled_flag && protp->open != NULL) {
00553       (*protp->open)(unit);
00554       if (protp->protocol != PPP_CCP) {
00555         ++num_np_open;
00556       }
00557     }
00558   }
00559 
00560   if (num_np_open == 0) {
00561     /* nothing to do */
00562     lcp_close(0, "No network protocols running");
00563   }
00564 }
00565 /* @todo: add void start_networks(void) here (pppd 2.3.11) */
00566 
00567 /*
00568  * The peer has failed to authenticate himself using `protocol'.
00569  */
00570 void
00571 auth_peer_fail(int unit, u16_t protocol)
00572 {
00573   LWIP_UNUSED_ARG(protocol);
00574 
00575   AUTHDEBUG(LOG_INFO, ("auth_peer_fail: %d proto=%X\n", unit, protocol));
00576   /*
00577    * Authentication failure: take the link down
00578    */
00579   lcp_close(unit, "Authentication failed");
00580 }
00581 
00582 
00583 #if PAP_SUPPORT || CHAP_SUPPORT
00584 /*
00585  * The peer has been successfully authenticated using `protocol'.
00586  */
00587 void
00588 auth_peer_success(int unit, u16_t protocol, char *name, int namelen)
00589 {
00590   int pbit;
00591 
00592   AUTHDEBUG(LOG_INFO, ("auth_peer_success: %d proto=%X\n", unit, protocol));
00593   switch (protocol) {
00594     case PPP_CHAP:
00595       pbit = CHAP_PEER;
00596       break;
00597     case PPP_PAP:
00598       pbit = PAP_PEER;
00599       break;
00600     default:
00601       AUTHDEBUG(LOG_WARNING, ("auth_peer_success: unknown protocol %x\n", protocol));
00602       return;
00603   }
00604 
00605   /*
00606    * Save the authenticated name of the peer for later.
00607    */
00608   if (namelen > (int)sizeof(peer_authname) - 1) {
00609     namelen = sizeof(peer_authname) - 1;
00610   }
00611   BCOPY(name, peer_authname, namelen);
00612   peer_authname[namelen] = 0;
00613   
00614   /*
00615    * If there is no more authentication still to be done,
00616    * proceed to the network (or callback) phase.
00617    */
00618   if ((auth_pending[unit] &= ~pbit) == 0) {
00619     network_phase(unit);
00620   }
00621 }
00622 
00623 /*
00624  * We have failed to authenticate ourselves to the peer using `protocol'.
00625  */
00626 void
00627 auth_withpeer_fail(int unit, u16_t protocol)
00628 {
00629   int errCode = PPPERR_AUTHFAIL;
00630 
00631   LWIP_UNUSED_ARG(protocol);
00632 
00633   AUTHDEBUG(LOG_INFO, ("auth_withpeer_fail: %d proto=%X\n", unit, protocol));
00634   if (passwd_from_file) {
00635     BZERO(ppp_settings.passwd, MAXSECRETLEN);
00636   }
00637 
00638   /*
00639    * We've failed to authenticate ourselves to our peer.
00640    * He'll probably take the link down, and there's not much
00641    * we can do except wait for that.
00642    */
00643   pppIOCtl(unit, PPPCTLS_ERRCODE, &errCode);
00644   lcp_close(unit, "Failed to authenticate ourselves to peer");
00645 }
00646 
00647 /*
00648  * We have successfully authenticated ourselves with the peer using `protocol'.
00649  */
00650 void
00651 auth_withpeer_success(int unit, u16_t protocol)
00652 {
00653   int pbit;
00654 
00655   AUTHDEBUG(LOG_INFO, ("auth_withpeer_success: %d proto=%X\n", unit, protocol));
00656   switch (protocol) {
00657     case PPP_CHAP:
00658       pbit = CHAP_WITHPEER;
00659       break;
00660     case PPP_PAP:
00661       if (passwd_from_file) {
00662         BZERO(ppp_settings.passwd, MAXSECRETLEN);
00663       }
00664       pbit = PAP_WITHPEER;
00665       break;
00666     default:
00667       AUTHDEBUG(LOG_WARNING, ("auth_peer_success: unknown protocol %x\n", protocol));
00668       pbit = 0;
00669   }
00670 
00671   /*
00672    * If there is no more authentication still being done,
00673    * proceed to the network (or callback) phase.
00674    */
00675   if ((auth_pending[unit] &= ~pbit) == 0) {
00676     network_phase(unit);
00677   }
00678 }
00679 #endif /* PAP_SUPPORT || CHAP_SUPPORT */
00680 
00681 
00682 /*
00683  * np_up - a network protocol has come up.
00684  */
00685 void
00686 np_up(int unit, u16_t proto)
00687 {
00688   LWIP_UNUSED_ARG(unit);
00689   LWIP_UNUSED_ARG(proto);
00690 
00691   AUTHDEBUG(LOG_INFO, ("np_up: %d proto=%X\n", unit, proto));
00692   if (num_np_up == 0) {
00693     AUTHDEBUG(LOG_INFO, ("np_up: maxconnect=%d idle_time_limit=%d\n",ppp_settings.maxconnect,ppp_settings.idle_time_limit));
00694     /*
00695      * At this point we consider that the link has come up successfully.
00696      */
00697     if (ppp_settings.idle_time_limit > 0) {
00698       TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit);
00699     }
00700 
00701     /*
00702      * Set a timeout to close the connection once the maximum
00703      * connect time has expired.
00704      */
00705     if (ppp_settings.maxconnect > 0) {
00706       TIMEOUT(connect_time_expired, 0, ppp_settings.maxconnect);
00707     }
00708   }
00709   ++num_np_up;
00710 }
00711 
00712 /*
00713  * np_down - a network protocol has gone down.
00714  */
00715 void
00716 np_down(int unit, u16_t proto)
00717 {
00718   LWIP_UNUSED_ARG(unit);
00719   LWIP_UNUSED_ARG(proto);
00720 
00721   AUTHDEBUG(LOG_INFO, ("np_down: %d proto=%X\n", unit, proto));
00722   if (--num_np_up == 0 && ppp_settings.idle_time_limit > 0) {
00723     UNTIMEOUT(check_idle, NULL);
00724   }
00725 }
00726 
00727 /*
00728  * np_finished - a network protocol has finished using the link.
00729  */
00730 void
00731 np_finished(int unit, u16_t proto)
00732 {
00733   LWIP_UNUSED_ARG(unit);
00734   LWIP_UNUSED_ARG(proto);
00735 
00736   AUTHDEBUG(LOG_INFO, ("np_finished: %d proto=%X\n", unit, proto));
00737   if (--num_np_open <= 0) {
00738     /* no further use for the link: shut up shop. */
00739     lcp_close(0, "No network protocols running");
00740   }
00741 }
00742 
00743 /*
00744  * check_idle - check whether the link has been idle for long
00745  * enough that we can shut it down.
00746  */
00747 static void
00748 check_idle(void *arg)
00749 {
00750   struct ppp_idle idle;
00751   u_short itime;
00752   
00753   LWIP_UNUSED_ARG(arg);
00754   if (!get_idle_time(0, &idle)) {
00755     return;
00756   }
00757   itime = LWIP_MIN(idle.xmit_idle, idle.recv_idle);
00758   if (itime >= ppp_settings.idle_time_limit) {
00759     /* link is idle: shut it down. */
00760     AUTHDEBUG(LOG_INFO, ("Terminating connection due to lack of activity.\n"));
00761     lcp_close(0, "Link inactive");
00762   } else {
00763     TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit - itime);
00764   }
00765 }
00766 
00767 /*
00768  * connect_time_expired - log a message and close the connection.
00769  */
00770 static void
00771 connect_time_expired(void *arg)
00772 {
00773   LWIP_UNUSED_ARG(arg);
00774 
00775   AUTHDEBUG(LOG_INFO, ("Connect time expired\n"));
00776   lcp_close(0, "Connect time expired");   /* Close connection */
00777 }
00778 
00779 #if 0 /* UNUSED */
00780 /*
00781  * auth_check_options - called to check authentication options.
00782  */
00783 void
00784 auth_check_options(void)
00785 {
00786   lcp_options *wo = &lcp_wantoptions[0];
00787   int can_auth;
00788   ipcp_options *ipwo = &ipcp_wantoptions[0];
00789   u32_t remote;
00790 
00791   /* Default our_name to hostname, and user to our_name */
00792   if (ppp_settings.our_name[0] == 0 || ppp_settings.usehostname) {
00793       strcpy(ppp_settings.our_name, ppp_settings.hostname);
00794   }
00795 
00796   if (ppp_settings.user[0] == 0) {
00797     strcpy(ppp_settings.user, ppp_settings.our_name);
00798   }
00799 
00800   /* If authentication is required, ask peer for CHAP or PAP. */
00801   if (ppp_settings.auth_required && !wo->neg_chap && !wo->neg_upap) {
00802     wo->neg_chap = 1;
00803     wo->neg_upap = 1;
00804   }
00805   
00806   /*
00807    * Check whether we have appropriate secrets to use
00808    * to authenticate the peer.
00809    */
00810   can_auth = wo->neg_upap && have_pap_secret();
00811   if (!can_auth && wo->neg_chap) {
00812     remote = ipwo->accept_remote? 0: ipwo->hisaddr;
00813     can_auth = have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote);
00814   }
00815 
00816   if (ppp_settings.auth_required && !can_auth) {
00817     ppp_panic("No auth secret");
00818   }
00819 }
00820 #endif /* UNUSED */
00821 
00822 /*
00823  * auth_reset - called when LCP is starting negotiations to recheck
00824  * authentication options, i.e. whether we have appropriate secrets
00825  * to use for authenticating ourselves and/or the peer.
00826  */
00827 void
00828 auth_reset(int unit)
00829 {
00830   lcp_options *go = &lcp_gotoptions[unit];
00831   lcp_options *ao = &lcp_allowoptions[0];
00832   ipcp_options *ipwo = &ipcp_wantoptions[0];
00833   u32_t remote;
00834 
00835   AUTHDEBUG(LOG_INFO, ("auth_reset: %d\n", unit));
00836   ao->neg_upap = !ppp_settings.refuse_pap && (ppp_settings.passwd[0] != 0 || get_pap_passwd(unit, NULL, NULL));
00837   ao->neg_chap = !ppp_settings.refuse_chap && ppp_settings.passwd[0] != 0 /*have_chap_secret(ppp_settings.user, ppp_settings.remote_name, (u32_t)0)*/;
00838 
00839   if (go->neg_upap && !have_pap_secret()) {
00840     go->neg_upap = 0;
00841   }
00842   if (go->neg_chap) {
00843     remote = ipwo->accept_remote? 0: ipwo->hisaddr;
00844     if (!have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote)) {
00845       go->neg_chap = 0;
00846     }
00847   }
00848 }
00849 
00850 #if PAP_SUPPORT
00851 /*
00852  * check_passwd - Check the user name and passwd against the PAP secrets
00853  * file.  If requested, also check against the system password database,
00854  * and login the user if OK.
00855  *
00856  * returns:
00857  *  UPAP_AUTHNAK: Authentication failed.
00858  *  UPAP_AUTHACK: Authentication succeeded.
00859  * In either case, msg points to an appropriate message.
00860  */
00861 u_char
00862 check_passwd( int unit, char *auser, int userlen, char *apasswd, int passwdlen, char **msg, int *msglen)
00863 {
00864 #if 1 /* XXX Assume all entries OK. */
00865   LWIP_UNUSED_ARG(unit);
00866   LWIP_UNUSED_ARG(auser);
00867   LWIP_UNUSED_ARG(userlen);
00868   LWIP_UNUSED_ARG(apasswd);
00869   LWIP_UNUSED_ARG(passwdlen);
00870   LWIP_UNUSED_ARG(msglen);
00871   *msg = (char *) 0;
00872   return UPAP_AUTHACK;     /* XXX Assume all entries OK. */
00873 #else
00874   u_char ret = 0;
00875   struct wordlist *addrs = NULL;
00876   char passwd[256], user[256];
00877   char secret[MAXWORDLEN];
00878   static u_short attempts = 0;
00879   
00880   /*
00881    * Make copies of apasswd and auser, then null-terminate them.
00882    */
00883   BCOPY(apasswd, passwd, passwdlen);
00884   passwd[passwdlen] = '\0';
00885   BCOPY(auser, user, userlen);
00886   user[userlen] = '\0';
00887   *msg = (char *) 0;
00888 
00889   /* XXX Validate user name and password. */
00890   ret = UPAP_AUTHACK;     /* XXX Assume all entries OK. */
00891       
00892   if (ret == UPAP_AUTHNAK) {
00893     if (*msg == (char *) 0) {
00894       *msg = "Login incorrect";
00895     }
00896     *msglen = strlen(*msg);
00897     /*
00898      * Frustrate passwd stealer programs.
00899      * Allow 10 tries, but start backing off after 3 (stolen from login).
00900      * On 10'th, drop the connection.
00901      */
00902     if (attempts++ >= 10) {
00903       AUTHDEBUG(LOG_WARNING, ("%d LOGIN FAILURES BY %s\n", attempts, user));
00904       /*ppp_panic("Excess Bad Logins");*/
00905     }
00906     if (attempts > 3) {
00907       /* @todo: this was sleep(), i.e. seconds, not milliseconds
00908        * I don't think we really need this in lwIP - we would block tcpip_thread!
00909        */
00910       /*sys_msleep((attempts - 3) * 5);*/
00911     }
00912     if (addrs != NULL) {
00913       free_wordlist(addrs);
00914     }
00915   } else {
00916     attempts = 0; /* Reset count */
00917     if (*msg == (char *) 0) {
00918       *msg = "Login ok";
00919     }
00920     *msglen = strlen(*msg);
00921     set_allowed_addrs(unit, addrs);
00922   }
00923 
00924   BZERO(passwd, sizeof(passwd));
00925   BZERO(secret, sizeof(secret));
00926 
00927   return ret;
00928 #endif
00929 }
00930 #endif /* PAP_SUPPORT */
00931 
00932 #if 0 /* UNUSED */
00933 /*
00934  * This function is needed for PAM.
00935  */
00936 
00937 #ifdef USE_PAM
00938 
00939 /* lwip does not support PAM*/
00940 
00941 #endif  /* USE_PAM */
00942 
00943 #endif /* UNUSED */
00944 
00945 
00946 #if 0 /* UNUSED */
00947 /*
00948  * plogin - Check the user name and password against the system
00949  * password database, and login the user if OK.
00950  *
00951  * returns:
00952  *  UPAP_AUTHNAK: Login failed.
00953  *  UPAP_AUTHACK: Login succeeded.
00954  * In either case, msg points to an appropriate message.
00955  */
00956 static int
00957 plogin(char *user, char *passwd, char **msg, int *msglen)
00958 {
00959 
00960   LWIP_UNUSED_ARG(user);
00961   LWIP_UNUSED_ARG(passwd);
00962   LWIP_UNUSED_ARG(msg);
00963   LWIP_UNUSED_ARG(msglen);
00964 
00965 
00966  /* The new lines are here align the file when 
00967   * compared against the pppd 2.3.11 code */
00968 
00969 
00970 
00971 
00972 
00973 
00974 
00975 
00976 
00977 
00978 
00979 
00980 
00981 
00982 
00983 
00984   /* XXX Fail until we decide that we want to support logins. */
00985   return (UPAP_AUTHNAK);
00986 }
00987 #endif
00988 
00989 
00990 
00991 /*
00992  * plogout - Logout the user.
00993  */
00994 static void
00995 plogout(void)
00996 {
00997   logged_in = 0;
00998 }
00999 
01000 /*
01001  * null_login - Check if a username of "" and a password of "" are
01002  * acceptable, and iff so, set the list of acceptable IP addresses
01003  * and return 1.
01004  */
01005 static int
01006 null_login(int unit)
01007 {
01008   LWIP_UNUSED_ARG(unit);
01009   /* XXX Fail until we decide that we want to support logins. */
01010   return 0;
01011 }
01012 
01013 
01014 /*
01015  * get_pap_passwd - get a password for authenticating ourselves with
01016  * our peer using PAP.  Returns 1 on success, 0 if no suitable password
01017  * could be found.
01018  */
01019 static int
01020 get_pap_passwd(int unit, char *user, char *passwd)
01021 {
01022   LWIP_UNUSED_ARG(unit);
01023 /* normally we would reject PAP if no password is provided,
01024    but this causes problems with some providers (like CHT in Taiwan)
01025    who incorrectly request PAP and expect a bogus/empty password, so
01026    always provide a default user/passwd of "none"/"none"
01027 
01028    @todo: This should be configured by the user, instead of being hardcoded here!
01029 */
01030   if(user) {
01031     strcpy(user, "none");
01032   }
01033   if(passwd) {
01034     strcpy(passwd, "none");
01035   }
01036   return 1;
01037 }
01038 
01039 /*
01040  * have_pap_secret - check whether we have a PAP file with any
01041  * secrets that we could possibly use for authenticating the peer.
01042  */
01043 static int
01044 have_pap_secret(void)
01045 {
01046   /* XXX Fail until we set up our passwords. */
01047   return 0;
01048 }
01049 
01050 /*
01051  * have_chap_secret - check whether we have a CHAP file with a
01052  * secret that we could possibly use for authenticating `client'
01053  * on `server'.  Either can be the null string, meaning we don't
01054  * know the identity yet.
01055  */
01056 static int
01057 have_chap_secret(char *client, char *server, u32_t remote)
01058 {
01059   LWIP_UNUSED_ARG(client);
01060   LWIP_UNUSED_ARG(server);
01061   LWIP_UNUSED_ARG(remote);
01062 
01063   /* XXX Fail until we set up our passwords. */
01064   return 0;
01065 }
01066 #if CHAP_SUPPORT
01067 
01068 /*
01069  * get_secret - open the CHAP secret file and return the secret
01070  * for authenticating the given client on the given server.
01071  * (We could be either client or server).
01072  */
01073 int
01074 get_secret(int unit, char *client, char *server, char *secret, int *secret_len, int save_addrs)
01075 {
01076 #if 1
01077   int len;
01078   struct wordlist *addrs;
01079 
01080   LWIP_UNUSED_ARG(unit);
01081   LWIP_UNUSED_ARG(server);
01082   LWIP_UNUSED_ARG(save_addrs);
01083 
01084   addrs = NULL;
01085 
01086   if(!client || !client[0] || strcmp(client, ppp_settings.user)) {
01087     return 0;
01088   }
01089 
01090   len = (int)strlen(ppp_settings.passwd);
01091   if (len > MAXSECRETLEN) {
01092     AUTHDEBUG(LOG_ERR, ("Secret for %s on %s is too long\n", client, server));
01093     len = MAXSECRETLEN;
01094   }
01095 
01096   BCOPY(ppp_settings.passwd, secret, len);
01097   *secret_len = len;
01098 
01099   return 1;
01100 #else
01101   int ret = 0, len;
01102   struct wordlist *addrs;
01103   char secbuf[MAXWORDLEN];
01104   
01105   addrs = NULL;
01106   secbuf[0] = 0;
01107 
01108   /* XXX Find secret. */
01109   if (ret < 0) {
01110     return 0;
01111   }
01112 
01113   if (save_addrs) {
01114     set_allowed_addrs(unit, addrs);
01115   }
01116 
01117   len = strlen(secbuf);
01118   if (len > MAXSECRETLEN) {
01119     AUTHDEBUG(LOG_ERR, ("Secret for %s on %s is too long\n", client, server));
01120     len = MAXSECRETLEN;
01121   }
01122 
01123   BCOPY(secbuf, secret, len);
01124   BZERO(secbuf, sizeof(secbuf));
01125   *secret_len = len;
01126 
01127   return 1;
01128 #endif
01129 }
01130 #endif /* CHAP_SUPPORT */
01131 
01132 
01133 #if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
01134 /*
01135  * set_allowed_addrs() - set the list of allowed addresses.
01136  */
01137 static void
01138 set_allowed_addrs(int unit, struct wordlist *addrs)
01139 {
01140   if (addresses[unit] != NULL) {
01141     free_wordlist(addresses[unit]);
01142   }
01143   addresses[unit] = addrs;
01144 
01145 #if 0
01146   /*
01147    * If there's only one authorized address we might as well
01148    * ask our peer for that one right away
01149    */
01150   if (addrs != NULL && addrs->next == NULL) {
01151     char *p = addrs->word;
01152     struct ipcp_options *wo = &ipcp_wantoptions[unit];
01153     u32_t a;
01154     struct hostent *hp;
01155     
01156     if (wo->hisaddr == 0 && *p != '!' && *p != '-' && strchr(p, '/') == NULL) {
01157       hp = gethostbyname(p);
01158       if (hp != NULL && hp->h_addrtype == AF_INET) {
01159         a = *(u32_t *)hp->h_addr;
01160       } else {
01161         a = inet_addr(p);
01162       }
01163       if (a != (u32_t) -1) {
01164         wo->hisaddr = a;
01165       }
01166     }
01167   }
01168 #endif
01169 }
01170 #endif /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
01171 
01172 /*
01173  * auth_ip_addr - check whether the peer is authorized to use
01174  * a given IP address.  Returns 1 if authorized, 0 otherwise.
01175  */
01176 int
01177 auth_ip_addr(int unit, u32_t addr)
01178 {
01179   return ip_addr_check(addr, addresses[unit]);
01180 }
01181 
01182 static int /* @todo: integrate this funtion into auth_ip_addr()*/
01183 ip_addr_check(u32_t addr, struct wordlist *addrs)
01184 {
01185   /* don't allow loopback or multicast address */
01186   if (bad_ip_adrs(addr)) {
01187     return 0;
01188   }
01189 
01190   if (addrs == NULL) {
01191     return !ppp_settings.auth_required; /* no addresses authorized */
01192   }
01193 
01194   /* XXX All other addresses allowed. */
01195   return 1;
01196 }
01197 
01198 /*
01199  * bad_ip_adrs - return 1 if the IP address is one we don't want
01200  * to use, such as an address in the loopback net or a multicast address.
01201  * addr is in network byte order.
01202  */
01203 int
01204 bad_ip_adrs(u32_t addr)
01205 {
01206   addr = ntohl(addr);
01207   return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET
01208       || IN_MULTICAST(addr) || IN_BADCLASS(addr);
01209 }
01210 
01211 #if 0 /* UNUSED */ /* PAP_SUPPORT || CHAP_SUPPORT */
01212 /*
01213  * some_ip_ok - check a wordlist to see if it authorizes any
01214  * IP address(es).
01215  */
01216 static int
01217 some_ip_ok(struct wordlist *addrs)
01218 {
01219     for (; addrs != 0; addrs = addrs->next) {
01220       if (addrs->word[0] == '-')
01221         break;
01222       if (addrs->word[0] != '!')
01223         return 1; /* some IP address is allowed */
01224     }
01225     return 0;
01226 }
01227 
01228 /*
01229  * check_access - complain if a secret file has too-liberal permissions.
01230  */
01231 static void
01232 check_access(FILE *f, char *filename)
01233 {
01234     struct stat sbuf;
01235 
01236     if (fstat(fileno(f), &sbuf) < 0) {
01237       warn("cannot stat secret file %s: %m", filename);
01238     } else if ((sbuf.st_mode & (S_IRWXG | S_IRWXO)) != 0) {
01239       warn("Warning - secret file %s has world and/or group access",
01240             filename);
01241     }
01242 }
01243 
01244 
01245 /*
01246  * scan_authfile - Scan an authorization file for a secret suitable
01247  * for authenticating `client' on `server'.  The return value is -1
01248  * if no secret is found, otherwise >= 0.  The return value has
01249  * NONWILD_CLIENT set if the secret didn't have "*" for the client, and
01250  * NONWILD_SERVER set if the secret didn't have "*" for the server.
01251  * Any following words on the line up to a "--" (i.e. address authorization
01252  * info) are placed in a wordlist and returned in *addrs.  Any
01253  * following words (extra options) are placed in a wordlist and
01254  * returned in *opts.
01255  * We assume secret is NULL or points to MAXWORDLEN bytes of space.
01256  */
01257 static int
01258 scan_authfile(FILE *f, char *client, char *server, char *secret, struct wordlist **addrs, struct wordlist **opts, char *filename)
01259 {
01260   /* We do not (currently) need this in lwip  */
01261   return 0; /* dummy */
01262 }
01263 /*
01264  * free_wordlist - release memory allocated for a wordlist.
01265  */
01266 static void
01267 free_wordlist(struct wordlist *wp)
01268 {
01269   struct wordlist *next;
01270 
01271   while (wp != NULL) {
01272     next = wp->next;
01273     free(wp);
01274     wp = next;
01275   }
01276 }
01277 
01278 /*
01279  * auth_script_done - called when the auth-up or auth-down script
01280  * has finished.
01281  */
01282 static void
01283 auth_script_done(void *arg)
01284 {
01285     auth_script_pid = 0;
01286     switch (auth_script_state) {
01287     case s_up:
01288       if (auth_state == s_down) {
01289         auth_script_state = s_down;
01290         auth_script(_PATH_AUTHDOWN);
01291       }
01292       break;
01293     case s_down:
01294       if (auth_state == s_up) {
01295         auth_script_state = s_up;
01296         auth_script(_PATH_AUTHUP);
01297       }
01298       break;
01299     }
01300 }
01301 
01302 /*
01303  * auth_script - execute a script with arguments
01304  * interface-name peer-name real-user tty speed
01305  */
01306 static void
01307 auth_script(char *script)
01308 {
01309     char strspeed[32];
01310     struct passwd *pw;
01311     char struid[32];
01312     char *user_name;
01313     char *argv[8];
01314 
01315     if ((pw = getpwuid(getuid())) != NULL && pw->pw_name != NULL)
01316       user_name = pw->pw_name;
01317     else {
01318       slprintf(struid, sizeof(struid), "%d", getuid());
01319       user_name = struid;
01320     }
01321     slprintf(strspeed, sizeof(strspeed), "%d", baud_rate);
01322 
01323     argv[0] = script;
01324     argv[1] = ifname;
01325     argv[2] = peer_authname;
01326     argv[3] = user_name;
01327     argv[4] = devnam;
01328     argv[5] = strspeed;
01329     argv[6] = NULL;
01330 
01331     auth_script_pid = run_program(script, argv, 0, auth_script_done, NULL);
01332 }
01333 #endif  /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
01334 #endif /* PPP_SUPPORT */